My uncle asked me for a primer on socialism. I was thinking maybe Socialism Made Easy or Socialism: Utopian and Scientific. Anything that might be better?

For context my whole family are through and through vote blue liberals. It's sad to say but most of them didn't even like/vote for Bernie during the primary cycles. They aren't really hardcore anticommunists though and have always been good on unions and labor generally, moreso the problem is really anti-Trump/pro-Dem brainworms. Maybe there's something more modern to share that I don't know of.